A man has recounted a series of very disturbing encounters he’s had with a spirit he believes is haunting his house.
Adam Ellis lives in a duplex in New York, and in a long Twitter thread, he tells of how one night he woke up with sleep paralysis and saw the figure of a boy sitting in a rocking chair at the end of his bed.

If memory (and a quick check on wikipedia) serves, sleep paralysis is often accompanied by hallucinations. It happened once for me and I could swear I saw an orchestra conductor in the corner of the room. Just because a person's sleep paralysis hallucinations are consistent doesn't mean there is a ghost around.

And cats get weird about stuff. A lot of times it's stuff they can hear or smell that we can't (or don't find it unusual).